Silica Powder Bulk Fumed Silica Sigma Aldrich Low Internal Stress Fused Silica Powder

Application:

It can significantly improve the strength, stability and use frequency of the finished products when used on refractory bricks, castables, ramming materials and other refractories.

High grade refractory raw materials

Precision casting and shell mold manufacturing and other purposes.
Grinding, artificial marble, semiconductor fillers, ceramic raw materials,  electronic industry, optics, glass, quartz glass instrument, chemical industry and various sandblasting.  

Fused silica sand / quarts sand  is mainly used for casting, grinding, artificial marble, semiconductor, electronics, optical, glass, quartz glass instruments, refractory, chemical and various sand blasting quartz sand.

Description
Fused quartz sand is colorless, transparent, massive, granular or white powder. It uses Donghai local high purity quartz as raw material, and produces amorphous silica by electro melting (the temperature of electro melting reaches 1800-2000 degrees Celsius). Then it is processed by special machine to remove impurities, screen and produce as bulk, granular and powdery products. It has the characteristics of high purity of silica, high content of SiO2, low thermal conductivity and excellent thermal stability, extremely low coefficient of thermal expansion, high insulation, and stable chemical properties.

Features
Near zero thermal expansion rate
Excellent thermal stability
High purity (99.9% of SiO2, low iron, potassium, sodium, titanium, etc.)
Stable chemical properties

Special machinery control production, stable particle size distribution